Type-writer.



PATENT-ED SEPT. 29,1903. A; HALSTRIGK. TYPE WRITER.

APPLICATION run!) an. 2. 1902.

H0 MODEL.

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1 NITED STATES Patented September 2 9, 1965;.

PATENT OFFIQE.

' TYPE-WRlT ER.

SPECIFICATION forming part of'Letters Patent No. 740,126, dated September 29, 1903.

Application filed January 2, 1902. Serial No. 88,080. (No morleLl T0 at whom it may concern:

Be it known that I, ADOLF HALSTRICK, a subject of the King of Prussia, German Emperor, residing at Cologne, in the Kingdom of Prussia, Empire of Germany, have invented a new and useful Type-Writer, of which the following is a specification.

My invention relates to improvements in type-writers in which the platen is raised and lowered in the carriage by a shift-key; and the objects of my improvement are, first, to' provide aspring for pressing upward a rocking frame on which the rail for supporting the platen and its frame is secured, so as to facilitate the raising of the platen; second, to provide a detent for securing the said rail in its lower position; third, to provide a mechanism for transmitting the movement from the shift-key to the rocking frame and to the detent, and, fourth, to provide means for securing the shift-key in its depressed position and for releasing it. I attain these objects by the mechanism illustrated in the accom panying drawings, in which-- Figure l is a vertical cross-section through the type-writer on the line A B in .Fig. 2. Fig. 2 is a plan, on a reduced scale, of the same, only the parts to be referred to later on being shown and the rear part of the carriage with the rear carriage-rail being omitted; and Fig. 3 is a vertical longitudinal section through the left part of the type-writer on the broken line C D. (Seen in the direction of the arrows incFig. 1.).

Similar letters of reference refer to similar parts throughout the several views.

In the machine-frame s the two rails 19 an 10' are secured for supporting and guiding the carriage 0 by means of the roller 0' within the casing 0 0a the front and two sliding arms 0 on the rear. The platen c is mounted to turn in its frame 0 which can move vertically in the carriage 0, the platen-spindle c being guided by slots q and the two vertical 'rods 7' r of the platen-frame '0 being guided by rollers r r on the carriage 0. The platenframe 0 with its usual parts (not shown) and with the platen c, rests and moves on the rail 0, by means of balls of.

The rail a is fastened on a horizontal rod a, which is secured between two levers g 9 near the sides of the machine-frame s and vers g and g isimmaterial.

forms with these levers a horizontal frame rocking around two pins g on the rear. The right lever g is assumed to have somewhat the shape of a U, so as to leave room for certain projecting parts, (not shown but it will be understood that the shape of' the two le- Beneath the two pins g a horizontal rod y is securedin the machine-frame s. This rod y is surrounded by a spiral spring, the free end I) of which bears from below against the horizontal rod 0.,

.and thus presses the rocking frame g 9 with the rail a, the platen-frame c and the platen c, upward. Thereby'the raising of I the platen c by means of the shift-key d, in a manner to be presently explained, is facilitated. As the platon c is now no longer pressed downward by its own weight and that of its frame 0 as usual, there would, how.- ever, be a danger of the alinement of-the lettors-written on the paper being impaired.

For this reason a detent eis mounted to rock on a pin e, secured in a projection of the horizontal part 5 of the machine-frame s, and the upper-bent end f of the detent e is arranged for taking over the lengthened end g -of the left lever g. Thereby the rocking frame g? g is secured in its depressed position, and hence also the platen c in its usual lower position, so that the alinement of the letters written on the paper is assured.

The shift-key d is secured on a shift-key lever d, which rocks on a pin a and is pivotally connected with an arm 8 of the detent e by means of a rod 7 On the horizontal part 8 a stud k is fastened, the upper end of which carries a pin It. armed lever Z is mounted to swing, and its shorter arm is pivotally connected with the shift-key lever d by a rod on. The longer arm of the lever Z engages in a notch of a projection n on the under side of the horizontal rod at. It will be evident that the weight of the shift-key (1, its leve'rd, the rod m, and the shorter arm of the lever Z will press the longer arm of the latter upward, so. that its end bears from below against the projection '21..

The front end of the shift-key lever cl is formed to a latch d On the front part of the machine-frame s a horizontal stud u is fastened, at the end of which a two-armed detent t is mounted to rock on -a pin. The

On this pin 70' a twolower arm of the detent if is pivotally connected with a horizontal rod 00, sliding in an eye u on the stud u. The rod 00 is provided with a hole, into which the lower inclined end 12 of a key v engages. The shaft of this key o slides in a vertical hole of the stud u, and the key o is held in its normal upper position by a spring w, surrounding its shaft. In this case the detent t occupies the position indicated by the full lines. On depressing the key 12, however, its inclined end i) will move the rod at forward and bring the detent- 6 into the position indicated by the dotted lines.

The various parts described so far occupy as a rule the positions shown when the platen c is in its lower position. For raising the platen othe shift-key d is depressed, when by the rod 2' the detent 6 will be turned forward in the direction of the arrow It, so as to release the projection g of the rocking frame g" g and at the same time by the rod 111 and the lever Z the rocking frame, with the rail a, the platen-frame c and the platen 0, will be lifted. The shift-key d may be secured in its depressed position by depressing the key 1), when the detent i will engage the latch (1 On again releasing the shift-key d or the key 1; all the parts will return to their initial positions.

The details of the mechanism can be varied without deviating from the spirit of my invention.

Having now described my invention, what I wish to secure by Letters Patent of the United States is 1. In a type-writer, the combination with a rocking frame provided with a rail for supporting the platen-frame and the platen movable vertically in the carriage, of a spring for pressing upward said rocking frame, a detent mounted to rock on a pin in the machine-frame and arranged for taking over said rocking frame when lowered, a shift-key lever pivotally connected with said detent by a rod, and a two-armed lever rocking on a pin in the machine-frame, the one arm of said two-armed lever hearing from below against said rocking frame and the other arm being pivotally connected with said shift-key lever by a rod, substantially as set forth.

2. In a type-writer, the combination with a rocking frame turning around a rear horizontal axis and provided with a rail for supporting the platen-frame and the platen movable vertically in the carriage, of a horizontal rod secured in the machine-frame, a spiral spring surrounding said horizontal rod and pressing with the free end said rocking frame upward, a detent mounted to rock on a pin in the machine-frame and arranged for taking over said rocking frame when lowered, a shift-key lever pivotally connected with said detent by a rod, a two-armed lever rocking on a pin in the machine-frame, the one arm of said two-armed lever hearing from below against said rocking frame and the other arm being pivotally connected with said shift-key lever by a rod, the front end of said shift-key lever being formed as a latch, and means for engaging said latch on the shift-key being depressed, substantially as set forth.

In witness whereof I have hereunto set my hand in presence of two witnesses.

ADOLF HALSTRICK. 

